💥(frontend) upgrade to ui-kit v2

Upgrade Docs to Ui-Kit v2 and apply new color
scheme from LaSuite design system.
This commit will probably create breaking changes if
user has custom styles applied to their docs.

src/frontend/apps/impress/package.json

@@ -35,11 +35,11 @@
     "@fontsource-variable/material-symbols-outlined": "5.2.28",
     "@fontsource/material-icons": "5.2.7",
     "@gouvfr-lasuite/integration": "1.0.3",
-    "@gouvfr-lasuite/ui-kit": "0.16.2",
+    "@gouvfr-lasuite/ui-kit": "0.18.0",
     "@hocuspocus/provider": "3.4.0",
     "@mantine/core": "8.3.6",
     "@mantine/hooks": "8.3.6",
-    "@openfun/cunningham-react": "3.2.3",
+    "@openfun/cunningham-react": "4.0.0",
     "@react-pdf/renderer": "4.3.1",
     "@sentry/nextjs": "10.27.0",
     "@tanstack/react-query": "5.90.6",